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Rozhen Night Plan

Up to ten targets, one night: each gets its good/marginal/poor windows (darkness × altitude × Moon × clouds, as on the single-target page), then the night is handed out five minutes at a time to whichever target is best — with hysteresis, so you get a few solid blocks of at least 30 minutes, not a flicker. Targets that never win a block are listed with the reason.

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Night of Wednesday, 12 August 2026 · astronomical night 22:12 → 04:40 (6.47 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 22:00–22:15: quality 0.2M31 22:15–22:35: quality 0.5M31 22:35–22:50: quality 0.6M31 22:50–23:05: quality 0.7M31 23:05–00:25: quality 0.8M31 00:25–01:45: quality 0.9M31 01:45–04:45: quality 1.0M31 04:45–05:25: quality 0.5M31 05:25–06:00: quality 0.2observe M31 00:45–02:20M42M42 05:45–06:00: quality 0.1M45M45 02:10–02:20: quality 0.4M45 02:20–02:30: quality 0.5M45 02:30–02:45: quality 0.6M45 02:45–03:00: quality 0.7M45 03:00–03:45: quality 0.8M45 03:45–04:45: quality 0.9M45 04:45–05:25: quality 0.5M45 05:25–05:50: quality 0.1M45 05:50–06:00: quality 0.2observe M45 03:55–05:25NGC 7000NGC 7000 21:00–21:35: quality 0.1NGC 7000 21:35–22:15: quality 0.5NGC 7000 22:15–00:00: quality 0.9NGC 7000 00:00–04:25: quality 1.0NGC 7000 04:25–04:45: quality 0.9NGC 7000 04:45–05:10: quality 0.5NGC 7000 05:10–05:25: quality 0.4NGC 7000 05:25–06:00: quality 0.1observe NGC 7000 21:35–23:10V1057 CygV1057 Cyg 21:00–21:35: quality 0.1V1057 Cyg 21:35–22:15: quality 0.5V1057 Cyg 22:15–00:00: quality 0.9V1057 Cyg 00:00–04:25: quality 1.0V1057 Cyg 04:25–04:45: quality 0.9V1057 Cyg 04:45–05:10: quality 0.5V1057 Cyg 05:10–05:25: quality 0.4V1057 Cyg 05:25–06:00: quality 0.1observe V1057 Cyg 23:10–00:45M33M33 23:35–23:45: quality 0.4M33 23:45–00:00: quality 0.5M33 00:00–00:15: quality 0.6M33 00:15–00:30: quality 0.7M33 00:30–01:35: quality 0.8M33 01:35–02:50: quality 0.9M33 02:50–04:45: quality 1.0M33 04:45–05:25: quality 0.5M33 05:25–06:00: quality 0.2observe M33 02:20–03:55scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

Each row is the target's quality through the night, white → amber → green for 0 → 0.3 → 0.6 → 1 (the same thresholds as poor / marginal / good). Dark blue: the schedule. Grey columns: twilight.  Download: schedule CSV · targets CSV · JSON

Schedule

localtargethoursmean quality
20:25–21:35 — nothing worth pointing at — 1.17
21:35–23:10 NGC 7000 1.58 0.74
23:10–00:45 V1057 Cyg 1.58 0.95
00:45–02:20 M31 1.58 0.93
02:20–03:55 M33 1.58 0.97
03:55–05:25 M45 1.5 0.71
05:25–06:30 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 97 22:40–04:45 (good) 89.7° at 04:40 110.3° 1.58
M42 Great Orion Nebula 0 0 — 42.9° at 09:30 64.3° 0.0
M45 Seven Sisters 55 55 02:40–04:45 (good) 72.5° at 07:40 83.1° 1.5
NGC 7000 North America Nebula 100 97 22:15–04:45 (good) 87.3° at 00:55 120.4° 1.58
V1057 Cyg 100 97 22:15–04:45 (good) 87.3° at 00:55 120.4° 1.58
M33 Triangulum Pinwheel 100 98 00:05–04:45 (good) 79.1° at 05:30 108.3° 1.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-08-12"

targets: names or RA Dec, separated by commas, semicolons or newlines, at most ten. The response carries targets[] (score, verdict, best_window, windows, transit, moon_separation), schedule[] (blocks with target, start/end in UTC and local, hours, mean_quality; target: null is idle time), unscheduled[] with a why, forecast_source, warnings[]. Missing targets → 400 {"error", "code": "targets_missing"}; an unreadable date → 400 {"error", "code": "invalid_date"}.